Antibiotic, which is bacteriostatic among the following is

The correct answer is Option (3) → Tetracycline

Antibiotics either kill microbes (bactericidal, a cidal effect) or only stop their growth (bacteriostatic, a static effect). Tetracycline is bacteriostatic; the other three options are bactericidal.

Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.

NCERT (Pre-rationalised edition, 2022-23):
Antibiotics – “… Antibiotics have either cidal (killing) effect or a static (inhibitory) effect on microbes. A few examples of the two types of antibiotics are as follows: Bactericidal: Penicillin, Aminoglycosides, Ofloxacin. Bacteriostatic: Erythromycin, Tetracycline, Chloramphenicol.”